WHAT IF...?
Airing Summer 2021 on Disney+, What If...? is a new animated series based on Marvel's classic series of "alternative history" comics that started in the '70s and explored how things might have played out if key moments in the Marvel timeline never happened. Featured here are all the (announced) new and returning MCU actors providing voices for the show, which in turn gives us some hints as to which stories are being tackled. Also, given that both Tony Stark and Iron Man can be made out in the background of the What If...? logo, a few more notable names might be announced in the next year or so.

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JEFFREY WRIGHT
Jeffrey Wright will be playing The Watcher, a celestial being assigned to watch over Earth and its surrounding solar system. He'll serve as the narrator for the series.

HAYLEY ATWELL
Hayley Atwell will voice Peggy Carter in a story focusing on what would happen if she was the one who became a super soldier. Steve Rogers will still join the fight with a suit made by Howard Stark, according to Marvel Studios president Kevin Feige. Chris Evans is not confirmed at this time, so he'll either be announced later or Steve will be recast (but hopefully not).

SEBASTIAN STAN
Sebastian Stan will voice Bucky Barnes for this First Avenger/Pre-Winter Soldier era story. Chris Evans is not confirmed at this time, so he'll either be announced later or the story has no Steve Rogers (or Steve will be recast, but hopefully not).

TOBY JONES
Toby Jones will return to voice Arnim Zola.

DOMINIC COOPER
Dominic Cooper is back as (the younger version of) Howard Stark.

JOSH BROLIN
Josh Brolin will voice Thanos, the Mad Titan. Thanos could either be in an Avengers story or in the separate Guardians of the Galaxy story. Or -- you know -- both.

KAREN GILLAN
Karen Gillan will voice Nebula.

MICHAEL ROOKER
Michael Rooker will voice Yondu.

DJIMON HOUNSOU
Djimon Hounsou will voice Korath.

SEAN GUNN
Sean Gunn will voice Kraglin.

CHRIS SULLIVAN
Chis Sullivan will voice Taserface.

SAMUEL L. JACKSON
Samuel L. Jackson will voice Nick Fury.

MARK RUFFALO
Mark Ruffalo will voice Bruce Banner and/or The Hulk.

JEREMY RENNER
Jeremy Renner will voice Clint Barton.

The What If...? title treatment.

Marvel's What If...?: Every New and Returning MCU Actor

WHAT IF...?
Airing Summer 2021 on Disney+, What If...? is a new animated series based on Marvel's classic series of "alternative history" comics that started in the '70s and explored how things might have played out if key moments in the Marvel timeline never happened. Featured here are all the (announced) new and returning MCU actors providing voices for the show, which in turn gives us some hints as to which stories are being tackled. Also, given that both Tony Stark and Iron Man can be made out in the background of the What If...? logo, a few more notable names might be announced in the next year or so.